Rn
86 noble gas Generated with AI
Radon
Symbol Rn
Atomic Mass 222
Radon is a chemical element with symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas, occurring naturally as a decay product of radium. Its most stable isotope, 222Rn, has a half-life of 3.8 days.
Properties
- Phase: Gas
- Density: 9.73 g/cm³
- Melting Point: 202 K
- Boiling Point: 211.5 K